options help, page-3

"Considering the 18.00 call option, a share price rise from $17.00to $18.00 gives an option price rise of 152%, while a share price rise from $ 18.00 to $19.00 gives an option price rise of 102% this option has 8 weeks to expiry."

I think gamma and vega plays a big role. gamma measures the increment movement in delta and vega measures the increment movement in implied volatility. gamma in particular increases exponentially as the option moves OTM to ATM and ATM to ITM. once delta fattens up above 50% gamma slows down. gamma and theta stripping is very popular. vega stripping can be done as an arbi play but too difficult to define a vega striping opportunity.